in government, u.n. poll sicks domestically. how do you weigh in on the ethics of using drone, and then second question, after the killing of bin laden, do you feel al-qaeda is more or less defeated? >> okay. good questions, both. on the subject of drones, i think they are the most significant advance in humanitarian warfare in history. i think that because the three principles of a just war are necessity, determination, and proportionality. necessity meaning are the people you are fighting, do you need to fight them? is there a way to deal with bin laden and other than shooting at them or capturing them? i come down strongly on the side of, no, these are irreconcilable. the next two questions are making sure that you're targeting the right people and that you're striking targets with the level of force required and no more; right? now, think about it, drones give you more than any tool in history the ability to make sure you are hitting the right target. doesn't mean they don't make mistakes, but you have a better chance of reaching that 100% goal with a drone than you do firing a shell or dr